fix: mongo 连接重试（容器编排 DNS 竞态导致启动循环重启）

server/src/config/database.js

@@ -1,42 +1,52 @@
-const mongoose = require('mongoose')
+const mongoose = require('mongoose')
-
+
-/**
+/**
- * 数据库连接配置
+ * 数据库连接配置
- */
+ */
-const connectDB = async () => {
+const connectDB = async () => {
-  try {
+  // 容器编排下 mongo 可能晚于应用就绪（DNS EAI_AGAIN），带重试启动
-    const mongoURI = process.env.MONGODB_URI || 
+  const mongoURI = process.env.MONGODB_URI ||
-      `mongodb://${process.env.MONGODB_USER}:${process.env.MONGODB_PASSWORD}@${process.env.MONGODB_HOST}:${process.env.MONGODB_PORT}/${process.env.MONGODB_DB}?authSource=${process.env.MONGODB_DB}`
+    `mongodb://${process.env.MONGODB_USER}:${process.env.MONGODB_PASSWORD}@${process.env.MONGODB_HOST}:${process.env.MONGODB_PORT}/${process.env.MONGODB_DB}?authSource=${process.env.MONGODB_DB}`
-    
+  const MAX_RETRIES = 10
-    const conn = await mongoose.connect(mongoURI, {
+  let conn = null
-      // Mongoose 6+ 不再需要这些选项，但保留以兼容旧版本
+  for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
-      // useNewUrlParser: true,
+    try {
-      // useUnifiedTopology: true,
+      conn = await mongoose.connect(mongoURI, {})
-    })
+      break
-    
+    } catch (err) {
-    console.log(`✅ MongoDB 连接成功: ${conn.connection.host}:${conn.connection.port}/${conn.connection.name}`)
+      console.warn(`MongoDB 连接失败(${attempt}/${MAX_RETRIES}):`, err.message)
-    
+      if (attempt === MAX_RETRIES) {
-    // 连接事件监听
+        console.error('MongoDB 连接重试耗尽，进程退出')
-    mongoose.connection.on('error', (err) => {
+        process.exit(1)
-      console.error('❌ MongoDB 连接错误:', err)
+      }
-    })
+      await new Promise(r => setTimeout(r, 3000))
-    
+    }
-    mongoose.connection.on('disconnected', () => {
+  }
-      console.warn('⚠️  MongoDB 连接断开')
+  try {
-    })
+    
-    
+    console.log(`✅ MongoDB 连接成功: ${conn.connection.host}:${conn.connection.port}/${conn.connection.name}`)
-    // 优雅关闭
+    
-    process.on('SIGINT', async () => {
+    // 连接事件监听
-      await mongoose.connection.close()
+    mongoose.connection.on('error', (err) => {
-      console.log('🔌 MongoDB 连接已关闭')
+      console.error('❌ MongoDB 连接错误:', err)
-      process.exit(0)
+    })
-    })
+    
-    
+    mongoose.connection.on('disconnected', () => {
-    return conn
+      console.warn('⚠️  MongoDB 连接断开')
-  } catch (error) {
+    })
-    console.error('❌ MongoDB 连接失败:', error.message)
+    
-    process.exit(1)
+    // 优雅关闭
-  }
+    process.on('SIGINT', async () => {
-}
+      await mongoose.connection.close()
-
+      console.log('🔌 MongoDB 连接已关闭')
-module.exports = connectDB
+      process.exit(0)
+    })
+    
+    return conn
+  } catch (error) {
+    console.error('❌ MongoDB 连接失败:', error.message)
+    process.exit(1)
+  }
+}
+
+module.exports = connectDB